Delhi's air quality nears 'severe' zone; GRAP stage 3 likely to kick in
The Hindu
The overall AQI of Delhi stood at 398 at 11 am, worsening from 357 at 4 pm on Friday. It was 354 on Thursday, 271 on Wednesday, 302 on Tuesday and 312 on Monday (Diwali).
A layer of pungent haze lingered over Delhi on Saturday morning as the city's air quality neared the "severe" zone amid adverse meteorological conditions -- low temperatures and calm winds -- and an increase in incidents of stubble burning in Punjab.
An official of the Commission for Air Quality Management (CAQM) said authorities will review the situation in the evening and may take a call on implementing anti-air pollution measures under stage three of the Graded Response Action Plan (GRAP) which include a ban on construction and demolition activities in NCR, except on essential projects, and restrictions on the plying of BS III petrol and BS IV diesel four wheelers.
The overall Air Quality Index (AQI) of Delhi stood at 398 at 11 am, worsening from 357 at 4 pm on Friday. It was 354 on Thursday, 271 on Wednesday, 302 on Tuesday and 312 on Monday (Diwali).
Anand Vihar (AQI 454) was the most polluted place in the capital. Wazirpur (439), Narela (423), Ashok Vihar (428), Vivek Vihar (427) and Jahangirpuri (438) were among the monitoring stations that recorded "severe" air quality.
The air quality in the neighbouring cities of Ghaziabad (381), Noida (392), Greater Noida (398), Gurugram (360) and Faridabad (391) also inched closer to the "severe" category.
An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".
According to the Central Pollution Control Board (CPCB), the concentration of lung-damaging fine particles known as PM2.5 was above 400 micrograms per cubic metre at 11 am, around seven times the safe limit of 60 micrograms per cubic metre, in many areas.
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